Composite blade for scissors, shears, etc., and cutter therefor



July 5,1921. IL PATRICK 63 50s COMPOSITE BLADE FOR SCISSORS, SHEARS,ETC. AND CUTTER THEREFOR Filed April 16, 1925 azew ( I By Attorr leys,

INVENTOR Patented Jul 5; 1927.

'- Isaac PAT IC -or JAMAIcmnEw YORK; I

coivirosrrn BLADE Eon sorssons, sn'EAIts, IElTQ, Ann CUTTER menses.

hp pl ic ationjfiled April .16, 1925} Serial mfaasos. I ,j-

This invention relates toconiposite blades for scissors, shears an'd'thellke, one part ot which is a detachable cutter, .andis replace-- able byanother when the edge thereof becomes dull, and also to a cutter, andaims to provide improvementsthereinl" c The invention provides compositeblades for. scissors or shears of an improved construction whereby, asecure connection be tween the parts 'of' said blade is obtained.

The, improved construction is simple and well suitedi 'or large scalemanufacture.

vTheinvention provldes a cutter or cutting part, which,' with thepartsof the fastening I means formedthereon, is readily made from' afiat strip of metal. v v

Certain pref-erred embodiments of the invention are illustrated intheaccompanying drawings, wherein,

Figure l is a side view of'the scissors. or

shears opened as in cutting, provided with I the improved compositeblade.

' Fig. 2 is'an enlarged edge view of. the scise sols-with parts thereot,shown in section;

plane of the line 33 ofFig. 2.-

Fig. 4 is a transverse section taken on the plane ottheline 4-4 of Fig.2.

Fig. 5 .isan edge view of the cutter ele- Fig. 6 is a top plan view ofthe' cutterele ment.

Figs. 7, 8 and 9 are detailvie ws'ofamodi fication of the cutter bladesh own in the preceding figures.

, Referring first to Figs. ltoi6 of the draw-1' ings, numerals 10, 11indicate a pair of blades'having handles 12, 13 forming a scissors,.th eblades of which are pivoted, as in dicated at 15, and saidzblades beingadapted to be opened and closed by the opening and closing of thehandles 1 2,; 13in the usual andwell understood manner. One or both ofthe blades 10, 11 is a composite blade, and

as herein shown, both of said blades are of this type. The compositeblade comprisesa cutteror cutting portion 17 and a supporting portion18.

' The cutter 17 is preterablyin the form of a thin flatstrip of metalhaving a sharpened edge 20 thereon constituting a cutting edge.

The supporting portion 18 oncits inner face is provided with a shallowrecess .22 in which the. cutter 17 is adapted to be fit or he and befastened; The said supporting portion 18 at 3 is atransverse sectiontakenonithe the lower part or to the} re ar of the" recess I 22opposite-the cuttingedgeQO (whenisaid cutter-isinsaidrecess)'-ispreferably p'IQY-f act of cutting. v

Means are provided for fastening the cut-" j ter 17" and theportion 18together, and preferably these vmeans are. provided at or near thetwoends of the cutter. These ineansare of such a character that the cutter-'17 'is sub manufacture, packing and. use. w

The fastening means 30 at the inner end of the cutter 17 is convenientlya prolonga- 'stantially fiat and is very QWell suited to tion 31 of theflat'fecessQQ to' o'r near the},

pivot .32of the scissors. Tlie cutter 17 -is' conveniently.providedlwitha tongue 33 projecting longitudinally thereof in the plane of the facesof the flat sides adapted to fit in" the prolonged portion ,31 of therecess 22.

The supporting portion 18 is provided with means for holding the innerend of the cut:

ter againstlthe,shou1der'25 thereon, and this means is convenientlyashoulder 3ft opposite the, shoulder 25, the shoulders'34 and 25 beingspaced the width of the tongue 33' of the cutter 17, the part 31 of thegreccss is' at a part of the scissors which is normally covered,-orpartly covered by theopposite blade during the normal use of thescissorsin cut.-

ting,.and the oppositeblade serves to'hold the cutter. 17 against thebroad face of. the

recess 22.;

The two blades 10,11 are preferably, re

silie ntly drawn together at the pivotal con-I l nection, and tothisend, said connection is conveniently in the form of a hollow rivet32havingla' head 36, and ,its opposite'end 3'7.

turned over; and confining between said ends and theblades .one or morespring washers 38. Theparts of thescissors as thus far dew scribed aresubstantially those as. described. in my applications'Ser. No. "(42,829,filed October 10, 1924, and Sen No. 23,505, filed April- 16,,1 925, I II U Themain feature of novelty of the present invention residesin themeans at thesouter end of the cutter for fastening it to the supeportingpart. As herein shown,.these means conveniently comprise a tongueand groove connection, the tongue or tongues .40 being, formedintegrally with the cutter l7, and;

preferably extending in a ldirectionflongitudinally With respect to thecutter. Sa'id tongueseO are" also preferably so formed that a portionthereof 11 lies Within' the planes of the faces 01": the cutter 1?" andwith parts 12 disposed in' planes"in 3 clined to the planes of the facesof the cutter and--- preferably 'inplanes inclined to the longitudinaldimension of the cutter. It is desirable that the tongues are resilient,and notwithstanding that they are formed from the"metal oi the blade ofthe cutter Which;isjpreferably of high quality spring steel, additionalresiliency J is provided for thenn'by cutting openings 13 at thejuncture ofsaicl tongues with the body of the cutter 17 To receive thesetongues, the supporting part 18 is formed with a recess is at the innerface thereof adjacent the rear edge of the supportingfpart'to' adepth-corre spending to the thickness oi 'the cutter'17, and of a lengthsubstantially equal to" that ofthe'portion diet the tongues 10. Andcommunicating With said recess are the inclined recesses 46 cut in therear edge of the" supporting member 18, and adapted to recei've theangular portions 42' of. thetongues 10. p

In 'themo'dification'shown in Figs; 7, 8 and 9,'the tongnes 10" areformed with a portion 11' similarlydispos'ed with respect the cutter,asjsth'e' part 41 W th respect to the cutter17, but the inclinedportion'sf42, it- Will be noted, have a muchless degree ofm clinationWith respect to theplanes of the cutter" than "these shown" in" the;preceding figures. Alsofinsteadbtf 1I1Clll1l recessesto' receive the'portions42y, therearedgeof the supporting part 18 is'formedf Wit-h'a'recess or roove 464111" its rear side, the faces of which eig't'eiidsiibst'antially pa al parallel to the planes of the faces? of thecritter 17, and the Width of said recess is'sub stai'itial'ly equal tothe thickness of the cutter 17 or tongues 42. lVhen a cutter is fastenedtoa support through the medium of means. stichas hereinbeforedescribedas positioned atthewarender thebmd, it will beeppre'ciate'dthat because of theres'il'ienoy of thetongues and the tendency" of theinclined parts'thereoffto assume their original "orfiat ositional theblade from Which they are f formed; that said "fastening means willtend" to cau's'efthe 'cutter'l'? to lie flat Within the" To fur recess22 in the supporting pa'rt. thei insu're the-proper'engageinent andalignment of the cutter 17 on the support18'and to're'sist canting ortwisting of the cutter in the recess 22, the"cutter'may providedwithoiieorn'iore ribs 50,51 projecting from itsfbackpface 'an'dada'pt'ed to fit into corresponding recesses of" depressions 52, 53

formed injthe supporting part 18*ot' the blade,i the' ribs and slotsbeing preferably formed with parallel Walls: The formations pieceblades.

to the inner face or thesupport ng part '18,*and thererore,

eseaes maintaintheirfproper' relation or (tension).

W'Vlien a cutter 17 becomes dullj'it maybe replaced by another,'theparts of 'thefasten iiig-mea-ns at the outer end of'the'scissor's beingforced 'orsprungapart by the an ertion of 'a "sharp instrument 'between'thecutter' and its support, and the inner end 33.0fthe' cutter slidoutwardly out of the portion3l of the reces's'22. The new cutter isreplaced by placing 'theextension' 33 in the prolonga tion 31 I of 'the're'cess and then snapping "the ears" 4:0 or 40 into their receiving"recess from the rearside' otthe blade.

The supporting portion '18 of the blade may be formed of analuminuniorother alloy such as now known, possessing sameness and strength similarto steel by" :lie-sha1'3ing or casting. By this method, closeuniformity.

in thesiz'e and s hape' of the supporting portions 18 of theblades maybe obtained,

which would thusrender the substitution or renewal" oicutters 17' beingmade Without diiiiculty; A uniformtit betweenithe supporting part 18 andthe cutterl'f used to Te 1 place other cutters 1 is thus "obtained.

The invention,itisto'be hnclerstood, receive 'ot-l'iei 'embodrments thanthose herein specifically illustrated and described, and-' may i beapplied to othertypes of seiss'ors' or 'shears than herein illustrated.v

VVhatIcl'ai n is e A v 1.- Pa cempositetime cm riing a'jcut ter and asupporting partand meaiisffor fastening 'said parts together, said-c'tte-rbeing, a flat plate eeinprising resilieii mean t they reariedge"thereof extending longitucii nall'y' 'With respect t0 the "cutter,- saidnieah's: engag ng over the rear edge of the support-'- ing part. Y

'iie

2. A composite bladeconip'risinga cutterand a supporting part and meansfor fasten? ing said parts together, said cutter 1 being aflatplatecomprisinga pair'of oppositely disposed aligned tongues on the rearedgethereof engaging over "the'rear edge lofth' supporting part.

3. compositeblade comprising a cutter aiid'a'supporti'ng part, and meansforfastening said' parts together coinprising a groove in' the rearedge'bfithesupportingl part and a tongue on the rearedge of the cutteradapted it be received in thegroove from" the rear side ofthesupportingpart i 4. A composite blade comprising a cutter and asupporting part, and neans for-fasten.- ing said parts together, saidcutter being a flat plate and said fastening means comprisng oppositelydisposed parts on the cutter at the rear edge thereof eXtendinglongitudinally with respect to the'cutter' and C11Sf posed in planesinclined to the planes of the faces of the cutter. a i y I 5. Acomposite blade comprising a cutter and a supporting part, and means forfastening said parts together, said cutter being a fiat plate andsaidfastening means comprising a tongue and groove connection betweensaid parts at the rear edges thereof, said to ngue and groove extendinglongitudinally or the blade.

6. A composite blade comprising a cutter and a supporting part,and-means for fastening said parts togeth r, saio cutter being a fiatplate andsaid fastening ineans comprising a tongue and groove connectionbetween said parts at the rear edges thereof, said tongue extendinglongitudinally With respect to the cutter and having its free end bentto incline it angularly With respect to the cutter. v

7. A composite blade comprising a cutter and a supporting part, andmeans for fastening said parts together, said cutter being a flat plateand said fastening means comprising parts on the cutter at the rear edgethere-' of extending longitudinally with respect top the cutter disposedin planes inclined to the planes of the faces of the cutter, and arecess in therear of said supporting part adapted to receive, from therear of said part the inclined parts on the cutter.

8. A composite blade comprising a cutter, and a supporting part, havinga longitudinal recess onits inner face into Which said cutter is adaptedto fit,a shoulder on the supporting part at the rear ofthe recess forsupporting said cutter opposite its cutting.

edge, a groove in said shoulder having a depth corresponding to thethickness of the cutter, a second groove in the rear of the supportingpart communicating with the first groove and a tongue onthe cutteradapted to fit in said grooves.

9. A composite blade comprising a cutter,

and a supporting part having a longitudinal recess on its inner faceinto Which said out ter is adaptedto fit, a shoulder on the sup-iporting part at the rearof the recess for supporting said cutteropposite its cutting edge, means for fasteningsaid partstogethercomprising a tongue and groove connection 7 near the outer end ofth'eblade, said tongue 7 being formed on the'rear edge of the cutter andengaging in a groove in the rear of the supporting part, said tonguebeing resilient and adapted to co-act With the all of said groove tourge the face of the cutter to lie fiat Within its recess.

10. A cornposite blade comprisinga cutter, and a supporting part havinga longitudinal recess on its inner face into which said cutter isadapted to fit, a shoulder on the support ing part at the rear of therecess for supporting said cutter opposite its cutting edge, means forfastening said parts together comprising a pair of oppositely disposedaligned tongues at the rear edge of the cutter near the outer end of theblade, said tongues having their free ends incl ned to the planes of thefaces of the cutter, and a groove inotlie.

ISAAC PATRICK.

